Wrench



A. H. BENWELL.

WRENCH.

APPLICATION FILED MAR. I. 1920.

Patented Aug. 31,1920Q Gull,

V fication.

will if.

To all whom it may concern: I

Be it known that I, ALBERT H. BENWELL,

a citizen of the United States, residing at St. Louis, State'of ltilissouri' have invented certain new and useful: Improvements in lVrenches, of which the following is a speci- This invention relates to certain new and useful improvementsin wrenches, the pecularities of which will be hereinafter de-' scribed and claimed. p The main object of my'invention is to'p'rovide a two-piece wrench of durable, efii cient, and quickly adjustable, design; and

secondly to provide onefthat is capable of reversing one aw to secure wide range of ad ustment.

In the accompanying drawing on which" like reference letters indicate corresponding parts, Figure 1' represents a face view of a wrench embodying my improvement; Fig. 2 a side edge view or" the same, Fig. 3 a detail side edge view of my auxiliary jaw; Fig. 4L a detailed face View of said jaw; and

Fig. 5 a face view of the lower end of the;

main jaw as in Fig. 1, with the auxiliary jaw reversed therein.

The letter A designates the main jaw of a wrench exemplifying my improvements having a head B formed by check plates on opposite side of a slot C between said plates. Said slot is traversed by a pin D located substantially in the center or said head as shown in Fig l and riveted .or otherwise securely fastened in the head so as to be practically integral therewith. This pin may extend wholly. across the slot G or only partially so such as a projection, but it is stronger construction for the pin to en-. gage both cheeks of the head B. Extending outward from the head opposite to the jaw A, is a handle E or any suitable length. The jaw A is curved laterally withregard to the axis of the head and handle as shown in Fig. 1. This constitutes the main member of the wrench. V

The other member consists of an auxiliary head composed of a jaw F serrated as shown, and provided with a reduced or thinner shank G, extending outward more or less at a right angle to the curved jaw F, and having in said shank a series of notches H, H and H of such size that they will readily engage selectively with the pin D in the slotted head. Three notches are shown Application ifiled ama 1, 1920. Seria1 No.'362,4 45.

I gagement with the article gripped.

numberof slots may be. provided.

rear

7 WRENCH;

Specification of Letters latent. Patented Aug..31 1920 in this design or" the auxiliary head and willbe seen from the detailview Fig. '4, I

readily retain their selective mounted os1t1on respectively upon saidf'pin D. f lhe engaged between the jaws A and F ,will

that the notches are curvedtoward the head I so as to form hooks and'thereby more in the direction F ofthe'arrow Fig. 1', by

which the jaw F will pull into closer enoppos'ite end of the shank G from the'jaw F, is a hole I that is adapted to receive a spring pin J Fig. 2, which will maintain its position in the 'hole I ordinarily, but may be readily pulled out when desired. The pin is like a split cotter pin having its two halves bowed outward near the end opposite the head, forming aswelled portion a little larger than the hole I, and leaving the pin of normal size between the swell and the head. The pin J prevents acci dental disengagement of the shank from the slot in the head B, on account of the head and end projecting from the sides of the shank, and yet allows the ready adjustment of any slot and consequent varied location of the jaw F when the pin selectively engages the respective slots. I

It will be observed that when the auxiliary jaw is inserted from one sideof the,

slotted head as shown in Fig. l, the jaws A and F oppose each other being curved concave in opposite directions, and by adjustment of the auxiliary aw comparatlvely large pipe or other ob ects such as nuts, may

be gripped between said jaws. The opposing faces of the jaws A and F are serrated 1n opposite dlrectlons regarding the 1nchnation of the teeth, so that the pulling action on the auxiliary jaw will be opposed by the pushing action on theteeth of the jmain jaw A. When it is desired to engage comparatively small articles either of pipe or plate form, the detachable pin J ispulled out 105' parallel, as distinguished from their oppo 7 In this latter position the curved aws A and F are more nearly 65 i be increased by a movement ofthe handle E v sitely curved position in Fig. 1, and thereby are adapted to grip curved plates or fiat plates or other thin plate articles between the generally parallel surfaces. The outer side edge of the jaw A is preferably serrated by teeth that incline opposite to those in the jaw F when mounted as in Fig. 5, for better engagement with the article to be gripped.

'Thus it is evident that by means'of this slotted shank of the auxiliary jaw the relative position of the jaws A and F may be quickly changed; also that by reversing the auxiliary jaw in. the slotted head, a finer gripping engagement may be effected by themore nearly parallel arrangement of the curvedjaws in'the latter position. Thus a Wide range of adjustment is readily effected and the change from one adjustment" to another is made without screw threaded engagement which is liable to wear and subject to damage. In my construction simplicity is attained as the wrench is practically in two members only and the Wearing parts are provided with large bearing surfaces.

I claim:

1. A wrench comprising a main jaw serrated on both sides and'having a slotted 7 to enter said slotted head from either side and engage said pin and thus adjustably cooperate with both'sides of said main jaw.

2. A wrench comprising a slotted head provided with a pin aerossthe slot, and

having a handle and a curvedlaterally with regard to said head and serratedon both sides, and an auxiliar jaw and shank curved laterally with regard to each other and provided with notches on said shank adapted to engage. selectively with said -pin,-said shank being insertible into the slotted head fromeither side and the auxil iary jaw being thereby generally parallel to the main jaw for gripping plate'or small pipe, or curved opposite to the same'when reversed for gripping relatively larger pipe, and variably adjustable in both positions substantially as described;

In testimony whereof I have afliXed my signature.

ALBERT. H. BENWELL. 

